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Product size
When implementing JB78 standard for DN80 bolt holes, Z=4, and for other standards, Z=8
technical data
1. Implement the standard GB/T 12238-2008
2. Structural Length Standard GB/T 12221-2005 ASME B16.10 JIS B2002
3. Flange size standard GB/T 9124.1-2019 ANSI B16.5 JIS B2212 (or according to the contract standard)
4. Pressure Test Standard GB/T 13927-2022 API 598
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